Tank-valve and discharge-pipe



c. A. LINDSTROM. TANK VALVE AND DISCHARGE PIPE.

APPLICATION FILED AUG-23, I9I6- Patented Mar, 30, 1920.

Saw-vented UNITED STATES PATENT OFFICE.

CHARLES A LINDSTROM, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO LPRESSEDSTEEL CAR COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF NEWJERSEY.

TANK-VALVE AND DISCHARGE-PIPE.

I Specification of Letters Patent.

Patented Mar. 30, 1920.

Application filed August 23, 1916. Serial No. 116,469.

the contents of the tank to be discharged.

through a discharge opening in the bottom of the tank.

Such devices have hitherto consisted of a lift valve or turning plughaving their seats made integral with the discharge pipe, or connecteddirectly thereto by screw threads or other means, a screw cap beinglocated at the lower end of the discharge pipe by which means anyleakage through the valve will be retained in the discharge pipe, whichextends below the tank and in many. instances below the car sills, topermit the application and removal of the screw cap or toattach a hoseto draw of]? the contents. In the event of an accident to the tank car,such'as derailment of the car, or the shifting of the tank on theunderframe or other causes, the discharge pipe, which, as stated before,projectsbelow the bottom of the tank, is liable to become damaged orbroken, in fact these pipes are frequently broken, and breakages causethe valves to unseat with a consequent leakage and loss of contents ofthe tank, and should the tank contain lading of an inflammable nature.there is an additional. risk of damage and loss by fire.

An object of this invention is to make an arrangement of tank valve,valve seat and discharge pipe which will avoid the disadvantages abovereferred to and still be s1mple and inexpensive.

A furtherobject of this invention 1s to construct and apply thedischarge pipe to the tank in such a manner that'in the event of thedischarge pipe being accidentally bent or broken, the valve and seat,-and their positions relative to each other, will not be disturbed, withthe result that the contents of the tank will not be permitted toescapefrom the tank as the result of such accident.

Another object of the invention is. to provide a discharge pipe andscrew cap entirely separate and independent from the valve and valveseat, but so arranged that there is no difference in the operationfromdevices in which the parts are integral.

' Another Ob ect of the invention is to provide an arrangement of thedischarge pipe,

valve seat and valve in which, when the discharge pipe gets broken,leakages through the valve can be collected by putting a cap or plug atthe lower end of the valve seat, or a hose may. be attached to the lowerend of the valve seat to draw off the contents of the tank and thus makethe tank serviceable until a new discharge pipe can be provided, all ofwhich greatly add to the safety of transportation and to facilities fordischarge of lading.

In the accompanying drawings, in which like reference characters referto like parts, Figure 1 is a plan view of a portionof the interior of atank provided with the valve,

valve seat and discharge pipe of this invention; Fig. 2 is a verticalsection taken on'thev longitudinal center line of the tank, showingthevalve, valve seat and discharge pipe. Fig. 3 is a cross section of aportion of the tank taken through the valve, valve seat and -dischargepipe,and Fig. 4 is a vertical section taken on the longitudinal centerline of the tank, showing the application of this invention to adifferent type of valve and valve seat.

Referring now in detail to the drawings, 1 indicates portion of theplate forming the shell of the tank, whichmay be of cylindrical or anypreferred shape and carried on the usual under-frame and wheeled trucks.

2 indicates an opening in the late 1, and 3 a circular valve seat memberaving a portion 4 for the valve 5 to seat upon and form 'a seal toprevent the escape of the contents of the tank. 6 indicates a downwardlyextending extension of the valve seat member. 3. adapted to engage withuide members 7 formed on the downward y extending ing stem which may beconnected to the.

valve 5 in any preferredmanner, said stem extendingupwardly through theinterior of the-tank and equipped with suitableoperat in means. 11indicates the discharge pipe w-ich is shown as having a' taperlngportion 12, provided with a flange 13, by which it is secured to thetank .plate 1 by any suitable means. At its lower end it is rovided witha portion 14 having a screw t read .15 formed therein by means of whichthe screw cap 16 is secured to the end of the discharge plpe.

The downwardly extending portion 6 of the valve seat member 3 ispreferably provided with a suitable screw thread 17 with which the capmember 16 is adapted to engage, so that in the; event of the dischargepipe 11 being broken, the cap member 16 can be applied and forma tightseal to prevent loss of any lading which may leak past the valve andseat.

- Further in the event of .breakageof the discharge pipe, a hosecoupling may be attached to the screw threaded portion 17 ofthe valveseat member 3, thus enabling the contents of the tank to be drawn off.and the tank to be made serviceable until a new discharge pipe can beapplied.

Fig. 4 shows in section the application of this invention to anothertype of valve and valve seat, the valve being provided with an upwardlyextending guide portion 18 adapted to be guided in an upwardly extendingcage-like portion 19 of the valve seat. This valve seat also is providedwith a cap member 20, and spring 21. which are intended to assist inretaining the valve on its seat. The lower portion of the valve seatmember is furnished with a screw threaded end and. cap, as described inconnection with the construction shown-in Figs. 2 and 3.

' It will be readily observed tliat in the construction just describedthere is no direct connection whatever between any portion of thedischarge pipe and the valve seat, and that in the event of thedischarge pipe being broken, such breakage will not be,

likely to affect the valve and seat.

I do not limit the invention, however, to the use of the two types ofvalves and valve seatsshown in the drawings-as it is plain that anyother types may be used without de a-rting from my invention.

Vhat I claim is:

1. The combination with a tank of a discharge opening in the bottom ofsaid tank, a va ve seatmember and valve for closing said opening, saidvalve seat member being secured to the outside of said tank, and adischarge pipe, separate from and independent of said valve seat member,secured to said tank independently of and inclosing said valve seatmember. said valve seat member extending into said discharge pipe.

-2. The combination with a tank, of a discharge opening inthe bottom ofsaid tank, a valve seat member and valve for closing said opening, and adischarge pipe, separate from and independent of said valve seat member,secured to the outside of said tank independently of and inclosing saidvalve seat member, said valve seat member extending into said dischargepipe. I

3. The combination with a tank of a discharge opening in the bottom ofsaid tank, a valve seat member and valve for closing said opening, saidvalve seat being secured to the outside of said tank, and a dischargepipe, separate from and independent of said val've seat member, securedto' the outside of said tank independently of and inclosing said valveseat member, said valve seat member extending into said discharge pipe.

4. The combination with a tank of a discharge opening in the bottom ofsaid tank, a valve seat member and valve for closing said opening, saidvalve seat being secured to the outside of said tank, and a dischargepipe, separate from and independent of said valve seat" member, securedto the outside of said tank independently of and surroundseat member,said valve seat member extending into said discharge pipe.

(5. The combination with a tank of a discharge opening in the bottom ofsaid tank, a valve seat member'and valve for closing said opening, a capfor closing said valve seat member, and a discharge pi e secured to saidtank independently of an inclosing said valve seat member.

7. The combination with a tank of a discharge opening in the bottom ofsaid tank,

a discharge pipe secured to said tank, a valve seat member and valveadapted to close said opening, and a cap adapted to close said valveseat member, said valve seat member being inclosed by and independent ofsaid discharge pipe.

8., The combination with a tank of a dis- "charge opening in the bottomof said tank,

a valve seat member and valve adapted to close said opening. a capadapted to close said valve seat member, and a discharge pipe secured tosaid tank independently of and adapted to be secured to either saidvalve surrounding said valve seat member. seat member or said dischargepipe. 10

9. The combination with a tank of a dis- In testimony whereof I afiix mysignature eharge opening in the bottom of said tank, in the presence oftwo witnesses.

a valve seat member and Valve for closing CHARLES A. LINDSTROM.

said openilw'. a discharge pipe secured to \Vitnesses:

said tank independently of and surrounding FRANK E. MILLER,

said valve seat member, and a cap member MARGERET SUMMERVELL.

